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STMicroelectronics L6226DTR
- Part No.:
- L6226DTR
- Manufacturer:
- STMicroelectronics
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
L6226DTR.pdf
- Description:
- IC MTR DRVR BIPOLAR 8-52V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
L6226DTR from STMicroelectronics is a DMOS dual full-bridge motor driver IC designed for bipolar stepper and dual/quad DC motor control, featuring 8–52 V operating supply, 2.8 A peak output current per bridge, 0.73 Ω typical RDS(on) at 25 °C, programmable high-side overcurrent detection, and integrated fast freewheeling diodes.
For engineers reviewing the L6226DTR datasheet, L6226DTR pinout, L6226DTR application, or L6226DTR equivalent, this device supports precise current-regulated motor phase control in compact industrial motion systems, with diagnostic feedback via open-drain OCD outputs and robust thermal/UVLO protection.
Technical Context
The L6226DTR integrates two independent full-bridge power stages using multipower-BCD technology, each with matched N-channel high-side and low-side DMOS transistors. It employs a charge-pump-based bootstrap circuit (VCP @ 0.6 MHz typ.) to drive high-side gates above VS, enabling efficient 100 kHz PWM operation.
Non-dissipative overcurrent detection monitors high-side current via on-chip sensing cells, comparing against a user-programmable threshold (via PROGCLA/PROGCLB resistors), while thermal shutdown activates at 165 °C (15 °C hysteresis) and undervoltage lockout engages below 5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 8–52 V - supports wide-range industrial DC bus inputs without external regulation. |
| Peak output current | 2.8 A per bridge - enables direct driving of medium-torque stepper phases or 12–48 V DC motors. |
| RDS(on) (HS + LS) | 1.47 Ω typ. at 25 °C - determines conduction loss and thermal rise under 1.4 A RMS load. |
| Switching frequency | Up to 100 kHz - allows high-resolution microstepping and fast transient response in closed-loop systems. |
| Overcurrent threshold | Programmable from 0.29 A to 2.8 A ±30% - sets precise current limit without external sense resistor power loss. |
| Thermal shutdown | 165 °C junction temperature with 15 °C hysteresis - prevents irreversible die damage during overload or poor heatsinking. |
| Diagnostic output | Open-drain OCDA/OCDB - sinks 4 mA to GND on fault, enabling direct EN pin feedback for auto-recovery or host MCU alert. |
Pinout & Package
Available in SO-24 (20+2+2) surface-mount package with exposed thermal slug (internally connected to pins 1,18,19, and GND). Pin count: 24. Thermal resistance: Rth-j-amb = 52 °C/W (SO24, no heatsink), Rth-j-pins = 15 °C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| IN1A / IN2A / IN1B / IN2B | Logic input | Accepts TTL/CMOS levels; controls H-bridge direction per half-bridge (truth table defined). |
| ENA / ENB | Bridge enable | Active-high logic input; pulls all MOSFETs OFF when low; commonly tied to OCDA/OCDB for self-protection. |
| OUT1A / OUT2A / OUT1B / OUT2B | Power output | High-current source/sink terminals for motor winding connections; rated for 2.8 A peak. |
| SENSEA / SENSEB | Current sense reference | Low-impedance connection point to power ground; must be routed with minimal trace inductance. |
| OCDA / OCDB | Fault indicator | Open-drain output pulled low during overcurrent or thermal fault; used for system-level diagnostics or EN feedback. |
| PROGCLA / PROGCLB | Current limit programming | Resistor-to-GND sets overcurrent threshold; 0 Ω = 2.8 A max; 5 kΩ ≈ 2.2 A; 39 kΩ ≈ 0.29 A. |
| VSA / VSB | Bridge power supply | Independent 8–52 V inputs for Bridge A and B; must be externally decoupled with ≥100 nF ceramic + bulk capacitor. |
| VBOOT | Bootstrap supply | Drives high-side gate above VS; requires external 220 nF boot capacitor and 1N4148 diode. |
Key Features
| Feature | Design Value |
|---|---|
| Cross-conduction protection | 1 µs typ. dead time between high-side and low-side switching prevents shoot-through in each leg. |
| Integrated freewheeling diodes | On-die Schottky-like diodes eliminate need for 4 external flyback diodes per bridge. |
| Paralleled operation support | Enables current sharing between Bridge A and B halves (e.g., OUT1A || OUT1B) to double effective current capability. |
| Non-dissipative overcurrent detection | Eliminates external current-sense resistor and associated 1–2 W power loss at 1.4 A RMS. |
| Charge pump oscillator | Internal 0.6 MHz VCP output drives external bootstrap network - no external clock required. |
Applications
| Bipolar Stepper Motor Control | Dual DC Motor Positioning |
|---|---|
|
Use Scenario: Driving 2-phase bipolar stepper motors in CNC axes or 3D printer extruders with microstepping drivers. IC Role / Device Role / Timing Role: Dual full-bridge provides independent phase current control; enables half/full-step commutation with programmable current limiting per coil. Use Value: Eliminates external sense resistors and discrete protection logic, reducing BOM count by ≥6 components per axis. |
Use Scenario: Independent bidirectional control of two 24 V DC motors in robotic joint actuators or automated valves. IC Role / Device Role / Timing Role: Each bridge drives one motor; ENA/ENB allow synchronized start/stop; OCD outputs feed MCU for stall detection. Use Value: Single-chip solution replaces two discrete half-bridge drivers, saving >30 mm² PCB area and simplifying thermal layout. |
| Quad DC Motor Fan Arrays | Industrial Linear Actuator Control |
|
Use Scenario: Controlling four 12–48 V brush DC fans in telecom chassis cooling systems with speed and fault monitoring. IC Role / Device Role / Timing Role: Bridges A and B operate as two independent dual-H-bridges; OCDA/OCDB report individual fan stall or short-circuit faults. Use Value: Enables per-fan diagnostics without additional current sensors - reduces system-level fault localization time by >70%. |
Use Scenario: Precision push/pull actuation in factory automation linear slides requiring force-limited extension/retraction. IC Role / Device Role / Timing Role: Current-regulated full-bridge drive with real-time overcurrent feedback; PROGCLA sets safe force limit via motor current. Use Value: Programmable current threshold ensures mechanical load protection without mechanical limit switches or external torque sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual full-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB6600HG | Higher voltage (50 V max), but fixed 4 A peak; no programmable OCD; larger TQFP-64 package. | Requires external current sense and protection logic; less suitable for space-constrained PCBs. | Choose when higher peak current is mandatory and board area is not constrained. |
| DRV8876PWPR | Single H-bridge (not dual); 3.6–45 V; integrated current regulation; smaller HTSSOP-28 package. | Requires two ICs for dual-bridge function; lacks diagnostic OCD outputs and paralleling support. | Prefer for new designs needing lower quiescent current (2 mA vs. 5–10 mA) and simpler layout. |
Compared with TB6600HG and DRV8876PWPR, the L6226DTR uniquely delivers dual-bridge integration with programmable, non-dissipative overcurrent detection and paralleling capability - critical for compact, self-protecting motion subsystems where component count and thermal management are prioritized.
Availability
L6226DTR is available at Aetrix Electronics and suitable for industrial motor control, robotics actuation, and precision motion systems requiring stable component supply across extended product lifecycles.
Supply support for L6226DTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in power management, motion control, and automotive-grade analog/mixed-signal ICs.
The L6226DTR belongs to ST's Power MOSFET Driver product line, engineered specifically for high-efficiency, thermally robust motor control in industrial automation and embedded motion applications.
FAQ
What is the maximum continuous output current per bridge?
The L6226DTR supports 1.4 A DC (RMS) output current per bridge under recommended thermal conditions (SO-24 package, 52 °C/W ambient, no heatsink). Peak current reaches 2.8 A for <1 ms pulses. Continuous operation at 1.4 A requires adequate PCB copper area or heatsinking to maintain junction temperature below 150 °C.
How is overcurrent detection programmed without external sense resistors?
Overcurrent detection uses internal high-side current mirroring - no external sense resistor needed. The threshold is set by connecting PROGCLA or PROGCLB to GND (2.8 A) or to a resistor (e.g., 5 kΩ for ~2.2 A). Threshold accuracy is ±30% over -25 to 125 °C, with fault reported via OCDA/OCDB open-drain outputs.
Can L6226DTR drive unipolar stepper motors?
No - the L6226DTR is designed exclusively for bipolar stepper motors and dual/quad DC motors. Its dual full-bridge topology provides bidirectional current flow per winding, which unipolar steppers do not require. Unipolar applications need dedicated unipolar drivers (e.g., ULN2003) or different control schemes.
What is the minimum recommended bootstrap capacitor value?
The datasheet specifies a minimum 220 nF ceramic capacitor (CBOOT) between VBOOT and VSx. This value ensures sufficient charge storage for high-side gate drive at 100 kHz switching with 52 V supply. Lower values risk insufficient gate voltage during sustained PWM, leading to increased RDS(on) and thermal stress on high-side MOSFETs.
L6226DTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STSPIN L62
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- Parallel
- Technology:
- DMOS
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 1.4A
- Voltage - Supply:
- 8V ~ 52V
- Voltage - Load:
- 8V ~ 52V
- Operating Temperature:
- -25°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
L6226DTR FAQ
1.How can I place an order for L6226DTR through Aetrix?
Please submit a Request for Quotation (RFQ) for L6226DTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for L6226DTR reliable?
The price and inventory of L6226DTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6226DTR is usually 5 days.
3.What payment methods are accepted for L6226DTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6226DTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6226DTR?
L6226DTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6226DTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for L6226DTR?
For technical support, including L6226DTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6226DTR requirements.
6.How does Aetrix verify that L6226DTR is sourced from the original manufacturer or authorized distributors?
All L6226DTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L6226DTR meets industry standards.
7.What is the process for return or replacement of L6226DTR?
All L6226DTR units undergo pre-shipment inspection (PSI). If there is an issue with L6226DTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The L6226DTR part is unused and in its original packaging.
Return procedure for L6226DTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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